database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-07-29 05:21:33 +03:00
Code Activity

table.h, sql_select.h:

Browse Source 
Added the code processing on expressions for applying
  multiple equalities.
sql_select.cc:
  Post-merge fixes for Item_equal patch.
  Added the code processing on expressions for applying
  multiple equalities.
Many files:
  Post-merge fixes for Item_equal patch.
item_cmpfunc.cc:
  Post-merge fixes for Item_equal patch.
  Fixed a problem when an equality field=const cannot be applied to
  the predicate P(field,c) for constant propagation as a conversion
  of field is needed.
item.h, item.cc:
  Fixed a problem when an equality field=const cannot be applied to
  the predicate P(field,c) for constant propagation as a conversion
  of field is needed.


mysql-test/r/func_test.result:
  Post-merge fixes for Item_equal patch.
mysql-test/r/index_merge.result:
  Post-merge fixes for Item_equal patch.
mysql-test/r/join_nested.result:
  Post-merge fixes for Item_equal patch.
mysql-test/r/range.result:
  Post-merge fixes for Item_equal patch.
sql/item.cc:
  Fixed a problem when an equality field=const cannot be applied to
  the predicate P(field,c) for constant propagation as a conversion
  of field is needed.
sql/item.h:
  Fixed a problem when an equality field=const cannot be applied to
  the predicate P(field,c) for constant propagation as a conversion
  of field is needed.
sql/item_cmpfunc.cc:
  Post-merge fixes for Item_equal patch.
  Fixed a problem when an equality field=const cannot be applied to
  the predicate P(field,c) for constant propagation as a conversion
  of field is needed.
sql/opt_range.cc:
  Post-merge fixes for Item_equal patch.
sql/sql_select.cc:
  Post-merge fixes for Item_equal patch.
  Added the code processing on expressions for applying
  multiple equalities.
sql/sql_select.h:
  Added the code processing on expressions for applying
  multiple equalities.
sql/table.h:
  Added the code processing on expressions for applying
  multiple equalities.
This commit is contained in:
unknown
2004-10-19 14:12:55 -07:00
parent 881534fb80
commit 05933f13f7
12 changed files with 416 additions and 160 deletions
Download Patch File Download Diff File Expand all files Collapse all files

57
sql/opt_range.cc
View File

@ -3339,6 +3339,63 @@ static SEL_TREE *get_mm_tree(PARAM *param,COND *cond)
}
DBUG_RETURN(ftree);
}
default:
if (cond_func->arguments()[0]->type() == Item::FIELD_ITEM)
{
field_item= (Item_field*) (cond_func->arguments()[0]);
value= cond_func->arg_count > 1 ? cond_func->arguments()[1] : 0;
}
else if (cond_func->have_rev_func() &&
cond_func->arguments()[1]->type() == Item::FIELD_ITEM)
{
field_item= (Item_field*) (cond_func->arguments()[1]);
value= cond_func->arguments()[0];
}
else
DBUG_RETURN(0);
}
/*
If the where condition contains a predicate (ti.field op const),
then not only SELL_TREE for this predicate is built, but
the trees for the results of substitution of ti.field for
each tj.field belonging to the same multiple equality as ti.field
are built as well.
E.g. for WHERE t1.a=t2.a AND t2.a > 10
a SEL_TREE for t2.a > 10 will be built for quick select from t2
and
a SEL_TREE for t1.a > 10 will be built for quick select from t1.
*/
for (uint i= 0; i < cond_func->arg_count; i++)
{
Item *arg= cond_func->arguments()[i];
if (arg != field_item)
ref_tables|= arg->used_tables();
}
Field *field= field_item->field;
Item_result cmp_type= field->cmp_type();
if (!((ref_tables | field->table->map) & param_comp))
ftree= get_func_mm_tree(param, cond_func, field, value, cmp_type);
Item_equal *item_equal= field_item->item_equal;
if (item_equal)
{
Item_equal_iterator it(*item_equal);
Item_field *item;
while ((item= it++))
{
Field *f= item->field;
if (field->eq(f))
continue;
if (!((ref_tables | f->table->map) & param_comp))
{
tree= get_func_mm_tree(param, cond_func, f, value, cmp_type);
ftree= !ftree ? tree : tree_and(param, ftree, tree);
}
}
}
DBUG_RETURN(ftree);
}